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Fixed a rather silly bug with SCU DSP execute flag [Angelo Salese]

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This commit is contained in:
Angelo Salese 2011-05-27 15:16:53 +00:00
parent 3f4046b146
commit 10701a9978
1 changed files with 11 additions and 10 deletions
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21
src/mame/machine/scudsp.c
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@ -4,6 +4,10 @@ System Control Unit - DSP emulator version 0.06
Written by Angelo Salese & Mariusz Wojcieszek
Changelog:
110527: Angelo Salese
- Fixed incorrectly setted execute flag clearance, allows animation of the Sega Saturn
splash screen;
051129: Mariusz Wojcieszek
- Fixed parallel instructions which increment CT registers to update CT register only
once, after dsp operation is finished. This fixes instructions like
@ -44,8 +48,8 @@ Changelog:
- overworked disassembler
TODO:
- Convert this to cpu structure
- Disassembler: complete it
- (Maybe) Convert this to cpu structure
- Add control flags
******************************************************************************************/
@ -66,8 +70,10 @@ Changelog:
#define ESF ((state->m_scu_regs[32] & 0x00020000) >> 17)
#define EXF ((state->m_scu_regs[32] & 0x00010000) >> 16)
#define LEF ((state->m_scu_regs[32] & 0x00008000) >> 15)
#define T0F_1 if(!(state->m_scu_regs[32] & 0x00800000)) state->m_scu_regs[32]^=0x00800000
#define T0F_0 if(state->m_scu_regs[32] & 0x00800000) state->m_scu_regs[32]^=0x00800000
#define T0F_1 state->m_scu_regs[32]|=0x00800000
#define T0F_0 state->m_scu_regs[32]&=~0x00800000
#define EXF_0 state->m_scu_regs[32]&=~0x00010000
#define EF_1 state->m_scu_regs[32]|=0x00040000
#define SET_C(_val) (state->m_scu_regs[32] = ((state->m_scu_regs[32] & ~0x00100000) | ((_val) ? 0x00100000 : 0)))
#define SET_S(_val) (state->m_scu_regs[32] = ((state->m_scu_regs[32] & ~0x00400000) | ((_val) ? 0x00400000 : 0)))
@ -730,15 +736,10 @@ static void dsp_end( address_space *dmaspace )
if(opcode & 0x08000000)
{
/*ENDI*/
if(!EF) state->m_scu_regs[32]^=0x00040000;
if(EXF) state->m_scu_regs[32]^=0x00100000;
}
else
{
/*END*/
if(EXF) state->m_scu_regs[32]^=0x00100000;
EF_1;
}
EXF_0; /* END / ENDI */
}
static void dsp_loop( void )